Account number 9 million is “taylorswift13” and details about it can be found on Statigram or Inkstagram. The first account on Instagram which is not private is number 3, and it belongs to its CEO and co-founder Kevin Systrom (“kevin”). His account can be found here and here.

So, here’s an idea. In the beginning of August, TechCrunch and others reported that Instagram had reached 150 million hosted photos. They actually even posted the 150 millionth photo that was taken by the user “janefot”. There is no way from the URL of each photo to determine what number it has. But one intersting thing happens when you check each URL using the site Inkstagram.

Update: A fact that would support my theory above is that the photo with the serial number #2 on Inkstagram, is this one by Instagram founder Kevin Systrom, who in a comment confirms that this is the first photo ever on Instagram: http://inkstagram.com/#/photos/2. (new URL: http://ink361.com/#/photos/2 ) Number 1 seems to be missing, but still, it seems that Inkstagram have been able to track all photos and number them in sequence as they were published.

And as is mentioned in the comments below, it may be that we should count photo number 200,000,003 as the 200 millionth. That photo however seems to be private, or at least we are not able to view it: http://inkstagram.com/#/photos/200000003

As you may know, I have been keeping an eye on the growth of the popular image hosting site/community Flickr. It turns out that in spite of new cool photo apps like Instragram and others quickly adding new fans, Flickr continues to grow with about one billion new photos per year, or to be more precise, it takes about 11 months to add another billion.